Long-Term Effects of Cropping Systems, Residues and Phosphorus on Soil Actinomycetes in Western Kenya

2021 ◽  
Author(s):  
Charles Nyamu Nyaga ◽  
Monica Mucheru-Muna ◽  
Mugendi Ezekiel ◽  
Job Kihara ◽  
Peter Bolo
Keyword(s):  
Cropping Systems ◽  
Long Term Effects ◽  
Western Kenya ◽  
Soil Actinomycetes

Long-term effects of manure application on grain yield under different cropping systems and ecological conditions in China

2008 ◽  
Vol 147 (1) ◽  
pp. 31-42 ◽  
Author(s):  
H. ZHANG ◽  
M. XU ◽  
F. ZHANG
Keyword(s):  
Grain Yield ◽  
Cropping Systems ◽  
Long Term Effects ◽  
Manure Application ◽  
Organic C ◽  
Wide Range ◽  
Long Term Experiments ◽  
Continuous Maize ◽  
Yield Trends

SUMMARYRice (Oryza sativaL.), wheat (Triticum aestivumL.) and maize (Zea maysL.) are the main crops grown in China. Applying organic manures is an important practice in sustaining soil fertility and agricultural productivity in these cropping systems. The current paper presents the effects of manure application on grain yields in nine long-term experiments that consist of one continuous maize, four wheat–maize and four rice-based cropping systems across a wide range of agro-ecological regions in China. The study shows that regular manure application can increase soil organic carbon (SOC) and grain yield across all the sites. Overall, regular use of manure results in larger increases in SOC in the maize and wheat–maize systems than in the rice-based systems. Application of manure tends to increase the grain yield in the maize and wheat–maize systems during the final years, but increases the grain yield in the rice-based systems during the initial years of the long-term experiments. There is only one site that shows significant improvement in the yield trend in association with the application of manure. The effects of manure on yield trends are probably determined by the initial yield and/or the ‘organic C effect’ that may cause gradual improvements in SOC and soil physical properties.

Long term effects of tillage practices and N fertilization in rainfed Mediterranean cropping systems: durum wheat, sunflower and maize grain yield

2016 ◽  
Vol 77 ◽  
pp. 166-178 ◽  
Author(s):  
Giovanna Seddaiu ◽  
Ileana Iocola ◽  
Roberta Farina ◽  
Roberto Orsini ◽  
Giuseppe Iezzi ◽  
...  
Keyword(s):  
Grain Yield ◽  
Durum Wheat ◽  
Cropping Systems ◽  
N Fertilization ◽  
Long Term Effects ◽  
Tillage Practices ◽  
Maize Grain Yield ◽  
Maize Grain

RESPONSE OF WHEAT–RICE AND MAIZE/MILLET SYSTEMS TO FERTILIZER AND MANURE APPLICATIONS IN THE MID-HILLS OF NEPAL

1999 ◽  
Vol 35 (1) ◽  
pp. 1-13 ◽  
Author(s):  
D. P. Sherchan ◽  
C. J. Pilbeam ◽  
P. J. Gregory
Keyword(s):  
Grain Yield ◽  
Organic Materials ◽  
Cropping Systems ◽  
Response To Treatment ◽  
Long Term Effects ◽  
Inorganic Fertilizers ◽  
Grain Yields ◽  
Combined Application ◽  
Double Cropping

Farmers in the mid-hills of Nepal have a mix of rainfed land on which millet is grown in relay after maize (maize/millet), and irrigated land on which wheat is grown sequentially after rice (wheat–rice). Double cropping is the norm but the diminishing quantities of organic materials, coupled with the trend towards increased use of inorganic fertilizers, have raised questions about the long-term productivity and sustainability of the cropping systems. The aim of this work was to examine the long-term effects (eight years) on grain yield of additions of manure and fertilizer either singly or in combination. Maize/millet and wheat–rice rotations were established on a Dystochrept at Pakhribas Agricultural Centre at about 1450 m altitude. Manure and fertilizer applications were applied to the maize (eight combinations in May) and the wheat (different rates in seven combinations in November) every year with the succeeding crops (millet and rice) utilizing residual nutrients. Yields of maize, millet and rice were greater when manure rather than fertilizer was applied but yields of wheat were less. The combined application of manure and fertilizer significantly increased yields of maize and wheat compared with applications of either manure or fertilizer alone. However, for the subsequent crops (millet and rice) there was either a small residual benefit of the combined application when compared with fertilizer alone, or no benefit when compared with manure alone. Overall, the combined application increased total grain yields by about 35% in the maize/millet rotation and by 16% in the wheat–rice rotation. There was no trend in yields in response to treatment with time.

NITROGEN FRACTIONS IN A GRAY WOODED SOIL AS INFLUENCED BY LONG-TERM CROPPING SYSTEMS AND FERTILIZERS

1971 ◽  
Vol 51 (3) ◽  
pp. 431-437 ◽  
Author(s):  
S. U. KHAN
Keyword(s):  
Cropping Systems ◽  
Amino Sugar ◽  
Mineral Fertilizers ◽  
Relative Distribution ◽  
Soil N ◽  
Long Term Effects ◽  
Total Acid ◽  
Ammonium N ◽  
Total Soil N

A study was undertaken to determine long-term effects of two cropping systems and various fertilizer treatments on the distribution of N in a Gray Wooded soil of Alberta. The relative amount (expressed as percent of total soil N) of total acid hydrolyzable N in soils from plots in the five-year rotation of grains and legumes was significantly greater than in the wheat-fallow sequence. A similar effect was also noted from the proportion of soil N present in the form of amino sugar N, amino acid N, hydroxyamino acid N and unidentified N in the acid hydrolyzates. The relative amounts of ammonium N in the acid hydrolyzate, the non-hydrolyzable N and the non-exchangeable ammonium N in soil were greater in the wheat-fallow plot soils than in the rotation. The relative amount of total hydrolyzable N was significantly lower in the manure, NPKS, NS, lime or P treated soils than in the control. The proportion of amino sugar N increased following the manure treatment. Long-term application of mineral fertilizers had no significant effect upon the percentage distribution of the different forms of hydrolyzable soil N and the non-exchangeable ammonium N in the soil. The relative distribution of amino acids was not affected by the two cropping systems or various fertilizer treatments, but differences were noted in the absolute amounts.

Simulating Long-Term Effects of Trash Management on Sugarcane Yield for Brazilian Cropping Systems

Sugar Tech ◽  
2013 ◽  
Vol 16 (2) ◽  
pp. 164-173 ◽  
Author(s):  
Fábio R. Marin ◽  
Peter J. Thorburn ◽  
Leandro G. da Costa ◽  
Rafael Otto
Keyword(s):  
Cropping Systems ◽  
Long Term Effects ◽  
Sugarcane Yield

Long-term effects of intensive rice–wheat and agroforestry based cropping systems on build-up of nutrients and budgets in alluvial soils of Punjab, India

2019 ◽  
Vol 66 (3) ◽  
pp. 330-342 ◽  
Author(s):  
Salwinder Singh Dhaliwal ◽  
Rama Krishna Naresh ◽  
Maninder K. Walia ◽  
Raj K. Gupta ◽  
Agniva Mandal ◽  
...  
Keyword(s):  
Cropping Systems ◽  
Alluvial Soils ◽  
Long Term Effects

Long-term effects of organic amendments on the rice yields for double rice cropping systems in subtropical China

2009 ◽  
Vol 129 (4) ◽  
pp. 534-541 ◽  
Author(s):  
Lidong Bi ◽  
Bin Zhang ◽  
Guangrong Liu ◽  
Zuzhang Li ◽  
Yiren Liu ◽  
...  
Keyword(s):  
Cropping Systems ◽  
Organic Amendments ◽  
Long Term Effects ◽  
Subtropical China ◽  
Rice Yields ◽  
Double Rice ◽  
Rice Cropping Systems
Sign in / Sign up

Export Citation Format

Share Document