scholarly journals Nutrient Interactions and Deficiency Diagnosis in the Lettuce II. Effects of Nutrition on Water Content

1957 ◽  
Vol 10 (1) ◽  
pp. 57 ◽  
Author(s):  
DW Goodall ◽  
WG Slater ◽  
AE Grant Lipp
Keyword(s):  
Water Content ◽  
Dry Matter ◽  
Sand Culture ◽  
Nutrient Interactions ◽  
Culture Experiment ◽  
Potassium Supply ◽  
Phosphorus And Potassium ◽  
Nitrogen Phosphorus

In a sand� culture experiment with lettuces, the water content (as per cent. of dry matter) of the aerial portions was studied in plants subjected to five levels of nitrogen, phosphorus, and potassium supply in all combinations.

scholarly journals Nutrient Interactions and Deficiency Diagnosis in the Lettuce

1955 ◽  
Vol 8 (3) ◽  
pp. 301 ◽  
Author(s):  
DW Goodall ◽  
AE Grant Lipp ◽  
WG Slater
Keyword(s):  
Plant Material ◽  
Dry Weight ◽  
Sand Culture ◽  
Nutrient Interactions ◽  
Stages Of Development ◽  
Culture Experiment ◽  
Foliage Plants ◽  
Phosphorus And Potassium ◽  
The Relationship ◽  
Nitrogen Phosphorus

A sand-culture experiment with lettuces is described, having as its principal purpose the study of the relationship between the potential responses of plants to applications of nitrogen, phosphorus, and potassium fertilizers and the composition of. their foliage. Plants were supplied initially with five levels of these nutrients in all combinations, samples of plant material were taken fot analysis at various stages of development, and at 44 days from sowing additional quantities of nutrients were supplied to some of the cultures in order that their response potentialities might be determined. The present paper analyses the effects of the nutrient interactions on plant dry weight, further results being left to subsequent papers.

scholarly journals Nutrient Interactions and Deficiency Diagnosis in the Lettuce III. Nitrogen Content and Response to Nitrogen

1957 ◽  
Vol 10 (3) ◽  
pp. 253 ◽  
Author(s):  
WG Slater ◽  
DW Goodall
Keyword(s):  
Dry Matter ◽  
Nitrate Nitrogen ◽  
Analytical Data ◽  
Sand Culture ◽  
Nutrient Interactions ◽  
Stages Of Growth ◽  
Matter Production ◽  
Subsequent Response ◽  
Phosphorus And Potassium ◽  
Nitrogen Phosphorus

Lettuce plants grown in sand culture, and receiving nitrogen, phosphorus, and potassium at five levels in all combinations, were analysed at different stages of growth for total, soluble, and nitrate nitrogen. An attempt was made to relate these analytical data to the subsequent response (in dry matter production) shown by the plants when a further amount of nitrogen was supplied.

Nutrient Interactions and Deficiency Diagnosis in the Lettuce V. Potassium Content and Response to Potassium

1958 ◽  
Vol 11 (4) ◽  
pp. 471 ◽  
Author(s):  
AE Grant Lipp ◽  
DW Goodall
Keyword(s):  
Dry Matter ◽  
Analytical Data ◽  
Potassium Content ◽  
Sand Culture ◽  
Nutrient Interactions ◽  
Stages Of Growth ◽  
Matter Production ◽  
Subsequent Response ◽  
Phosphorus And Potassium ◽  
Nitrogen Phosphorus

Lettuce plants grown in sand culture, and receiving nitrogen, phosphorus, and potassium at five levels in all combinations, were analysed at different stages of growth for these elements. An attempt was made to relate these analytical data to the subsequent response (in dry matter production) shown by the plants when a further amount of potassium was supplied.

scholarly journals Nutrient Interactions and Deficiency Diagnosis in the Lettuce IV. Phosphorus Content and Response to Phosphorus

1958 ◽  
Vol 11 (1) ◽  
pp. 30 ◽  
Author(s):  
AE Grant Lipp ◽  
DW Goodall
Keyword(s):  
Growth Response ◽  
Phosphorus Content ◽  
Analytical Data ◽  
Sand Culture ◽  
Nutrient Interactions ◽  
Stages Of Growth ◽  
Phosphorus And Potassium ◽  
Nitrogen Phosphorus

Lettuce plants grown in sand culture, and recelvmg nitrogen, phosphorus, and potassium at five levels in all combinations, were analysed at different stages of growth for these elements. An attempt was made to relate these analytical data to the growth response following a supplementary application of phosphorus.

Differential tolerance to manganese in introduced and bred lines of Macroptilium atropurpureum

1978 ◽  
Vol 29 (1) ◽  
pp. 67 ◽  
Author(s):  
EM Hutton ◽  
WT Williams ◽  
CS Andrew
Keyword(s):  
Dry Matter ◽  
Inorganic Nitrogen ◽  
Evaluation Studies ◽  
Nitrogen Sources ◽  
Manganese Concentration ◽  
Sand Culture ◽  
Manganese Tolerance ◽  
Growth Evaluation ◽  
Macroptilium Atropurpureum ◽  
Nitrogen Phosphorus

A number of lines of Macroptilium atropurpureum, including cv. Siratro, were grown in two experiments at different manganese levels in sand culture. In one experiment 40 ppm manganese was used in conjunction with nitrogen either in inorganic form or as Rhizobium; in the other, two levels of excess manganese (30 and 45 ppm) were used with rhizobial nitrogen at a lower pH. Dry matter yields for tops, roots and nodules were recorded, and the plant material analysed for nitrogen, phosphorus, calcium and manganese. Dry matter yields of tops were reduced, and the ratio of root to total dry matter yield increased, by both Rhizobium and excess manganese. Tops, but not roots or nodules, showed considerable differences in manganese tolerance between lines. Excess manganese caused small but significant changes in concentrations of other minerals. Regressions of rhizobial on inorganic nitrogen showed that at the levels used excess manganese does not impair rhizobial efficiency. Numerical analyses suggested that manganese tolerance operates at three levels; more vigorous lines usually remain so in the presence of manganese, some lines appear to be able to resist the uptake of excess manganese, and for any given level of manganese concentration within the plant, some lines appear more sensitive than others. The results show that growth evaluation studies can be carried out equally well with rhizobial or inorganic nitrogen sources, and they suggest that it should be possible to improve the tolerance of M. atropurpureum lines by selection and/or breeding.

scholarly journals Comparison of logistic, energy and exploitative parameters of compost and manure application by spreaders

2017 ◽  
Vol 63 (Special Issue) ◽  
pp. S33-S39
Author(s):  
Souček Jiří ◽  
Pražan Radek ◽  
Roy Amitava ◽  
Plíva Petr ◽  
Jelínek Antonín ◽  
...  
Keyword(s):  
Working Conditions ◽  
Dry Matter ◽  
Agricultural Land ◽  
Matter Content ◽  
Organic Fertilizers ◽  
Dry Matter Content ◽  
Volume Weight ◽  
Lower Volume ◽  
Phosphorus And Potassium ◽  
Nitrogen Phosphorus

This article deals with comparison of composts and manure use from the viewpoint of handling, transport and application on agricultural land. The published values were established by measurements under working conditions and afterwards converted on the basis of the content of nutrients defined in laboratory. Compost contained a greater share of nitrogen, phosphorus and potassium and had higher dry matter content and lower volume weight. Direct consumed energy expressed by recalculation of the consumed diesel fuel in case of composts moved from 5.12 MJ/kg (potassium) up to 16.19 MJ/kg (phosphorus). In case of manure it was higher and moved from 10.49 MJ/kg (nitrogen) up to 29.79 MJ/kg (phosphorus). The greatest share in energy consumption occupies transport, which was considered uniformly at the distance of 5 km. The study confirmed the feasibility of use of compost in agriculture as a partial substitute of conventional organic fertilizers; for its handling, transport and application the standard mechanization used for manure may be utilized.

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