Beyond an optimal plant density, seed yield per unit area declines in older cultivars of maize, and yield and seed size decline in the domestic sunflower.
According to its biannual report on global food markets, the FAO warned that weather conditions – too much or too little rain – could weaken maize and wheat yields in Europe and North America, and an overall rundown on food inventories is set to tighten global supply.
Runoff curve number [US Department of Agriculture, Soil Conservation Service (1972) National Engineering Handbook, Hydrology Section 4, chapters 4 10] changes had the greatest impact on simulated maize and sorghum yields for all the counties.
Correlation of N P K fertilizer input with rice, maize and wheat yield was also found insignificant (Table 4), which further raises doubt on exactness of the dataset.
Maize and soybean yield suppression with leucaena barriers for the different tillage practices was less pronounced, and improved crop performance at the centre of terraces consistently compensated for any yield reductions at the barrier crop interface.
Differences between treatments in soil water, maize growth and yield variables were analyzed using ANOVA.
Maize growth and yield parameters significantly increased by highest values obtained from CJ at 2.5 t/ha.
A correlation matrix was prepared depicting area vs. yield (in rice, wheat and maize cultivation), and yield vs. inputs of N, P, and K fertilizers.
Tillage treatments, thus use of manure instead of residue, had no significant effects on maize biomass and yield.
Maize growth and yield, as well as weed growth, were examined for three years in terrestrial mesocosms under natural rainfall.
