A Method of Measuring Pollinator Populations on Field Crops

1952 ◽  
Vol 84 (10) ◽  
pp. 314-316 ◽  
Author(s):  
M. V. Smith ◽  
G. F. Townsend
Keyword(s):  
Seed Production ◽  
Large Degree ◽  
Factors Affecting ◽  
Field Crops ◽  
Pollinating Insects ◽  
Pollinator Populations

The seed production of many field crops, and in particular of legumes, depends to a large degree upon the number of pollinating insects present in the field during the blooming period. A study of the various factors affecting seed production requires, among other things, a knowledge of the population of pollinating insects present, and a ready means of comparing pollinator populations from one field to another. To obtain this information some means must be employed to count and classify the pollinating insects in the field.

Factors affecting fruit and seed production of Paeonia ostii “Feng Dan”, an economically important oil tree

2021 ◽  
Vol 36 (2) ◽  
pp. 258-268
Author(s):  
Guo‐Xing Cao ◽  
Hong‐Qiang Lin ◽  
Yue‐Hong Cheng ◽  
Xie Wang
Keyword(s):  
Seed Production ◽  
Factors Affecting

scholarly journals DEVELOPMENT OF FIELD CROP SEED PRODUCTION IN RUSSIA

2020 ◽  
Vol 8 (3) ◽  
pp. 81-85
Author(s):  
Artem Lukomec
Keyword(s):  
Food Security ◽  
Seed Production ◽  
Production System ◽  
Selection Process ◽  
Biological Properties ◽  
Field Crop ◽  
High Quality ◽  
Main Condition ◽  
Field Crops ◽  
High Quality Seed

Seed production of field crops plays a key role in ensuring food security of the country and is a continuation of the selection process, a necessary link for the development and maintenance of the variety. In seed production, the main object is a variety that is genetically close to each other a certain group of plants, homogeneous in morphological and biological properties. The finish of high-quality seed production is seeds with good varietal and sowing qualities. The main condition for effective production of field crops is a well-established seed production system, which is a set of functionally interconnected structures engaged in the production of elite and reproductive seeds. Seed production of field crops solves two main tasks: variety exchange and variety renewal. When a variety is changed, one zoned variety is replaced by another with more valuable economic characteristics. During variety renewal, varietal seeds in farms are replaced with seeds of the same varieties, but of higher reproductions. Usually, seeds for cereals and legumes are updated every 3-4 years, for millet - every 2 years, for sunflower - annually. The main goal of seed production of field crops is to maintain a set of characteristics of the variety, its most valuable qualities and economic indicators.

FACTORS AFFECTING SCALE OF ENTERPRISE

1985 ◽  
Vol 2 ◽  
pp. 37-40
Author(s):  
Logan Freeman
Keyword(s):  
Seed Production ◽  
White Clover ◽  
Trifolium Repens ◽  
Factors Affecting ◽  
Alternative Crops ◽  
New Cultivars

White clover is undersown in the spring with wheat, barley and peas. Irrigation is used in order to achieve a heavy flowering in the white clover crop over one month. Three barley crops must be grown successively in some paddocks to eliminate yarrow. Lupins, peas and soybeans are alternative legumes to white clover, but white clover is still the preferred legume to grow, especially with new cultivars becoming available. Keywords: White clover, Trifolium repens, seed production, yarrow, alternative crops, overseas markets.

Seed Production Technologies of Some Major Field Crops

2019 ◽  
pp. 655-678
Author(s):  
Irfan Afzal ◽  
Rubab Shabir ◽  
Saeed Rauf
Keyword(s):  
Seed Production ◽  
Major Field ◽  
Field Crops ◽  
Production Technologies

Studies of seed production in two Austrodanthonia grass cultivars

2002 ◽  
Vol 53 (11) ◽  
pp. 1197 ◽  
Author(s):  
G. M. Lodge
Keyword(s):  
Seed Germination ◽  
Seed Production ◽  
Early Stage ◽  
Early Flowering ◽  
Harvest Time ◽  
Flowering Stage ◽  
N Application ◽  
Factors Affecting ◽  
The Mean ◽  
Early Harvest

Studies were conducted in 1993–94 on 2 native grass cultivars, Austrodanthonia richardsonii (Link) H.P.�Linder (syn. Danthonia richardsonii Cashmore) cv. Taranna and A. bipartita (Link) H.P. Linder (syn. D. linkii Kunth) cv. Bunderra, to quantify the important morphological factors affecting seed production (as measured by seed weight, g/plant). Experiments also examined the influence of nitrogen (N) application and investigated the effects of time and method of harvest on seed production and subsequent germination. For both cultivars, inflorescence and floret number accounted for the highest proportion of the variation in seed production per plant (R2 = 0.873 and 0.686 for Taranna and Bunderra, respectively). Although N applied (0, 25, and 50 kg/ha) at the late vegetative or early flowering stage, or split applications at both times, had no significant effect (P > 0.05) on the seed production per plant of Taranna and Bunderra, further studies of N effects are required. In 1993 and 1994, time of inflorescence harvest and method of harvest had no significant effect on inflorescence number and seed production of Taranna and Bunderra and no significant effect on the subsequent germination of Bunderra seed. However, in 1993, harvesting at an early stage of flowering (10% of florets white and fluffy) reduced Taranna seed production by 17% compared with the mean and decreased (P < 0.05) seed germination by about 10%. In 1994, harvesting at early flowering (5% florets white and fluffy) reduced Taranna seed production by a mean of around 55% compared with harvesting at 50% maturity, and subsequent seed germination was also lower (P < 0.05) for the early harvest time. Application of 1 L/ha of paraquat (a.i. 200 g/L of paraquat dichloride) at mid-flowering to desiccate the crop in 1993 had no significant effect on the germination of Taranna and Bunderra caryopses. The implications of these data for commercial seed production are discussed.

Seed production and persistence of Carnamah and other early strains of Trifolium subterraneum in the wheatbelt of Western Australia

1967 ◽  
Vol 7 (24) ◽  
pp. 25 ◽  
Author(s):  
GB Taylor ◽  
RC Rossiter
Keyword(s):  
Seed Production ◽  
Seed Yield ◽  
Western Australia ◽  
Subterranean Clover ◽  
Trifolium Subterraneum ◽  
Growing Season ◽  
Early Flowering ◽  
The Other ◽  
Factors Affecting ◽  
Seed Yields

Seed production and persistence of the Carnamah, Northam A, Dwalganup, and Geraldton strains of subterranean clover (Trifolium subterraneum L.) were examined in undefoliated swards in the wheatbelt of Western Australia. The early flowering characteristic of Carnamah was not always associated with higher seed yields. Only when there was a well-defined, early finish to the growing season, or when flowering was very much earlier in Carnamah (viz., following an early 'break' to the season), did this strain clearly outyield both Northam A and Geraldton. The seed yield of Dwalganup was generally inferior to that of the other strains. Factors affecting regeneration are discussed. Under low rainfall conditions, poorer germination-regulation of Carnamah, compared with Geraldton and Northam A, would be expected to result in poorer persistence unless offset by higher seed yields in the Carnamah strain.

Sign in / Sign up

Export Citation Format

Share Document