As a simplified representation of the farm labour force, the farmer carries out tasks on both sows and batches.
Real-time measures of canopy size as a basis for spatially varying nitrogen applications to winter wheat sown at different seed rates.
Similarly, in 1995 successive delays in sowing caused dramatic yield declines, and the maximum yield was much lower, at 0.44 t ha71.
Both groups were sowed in plastic trays (37 x 28 cm) containing regularly moistened vermiculite.
Farmers do not follow standard agronomic practices, and plant at varied population densities and sowing dates.
Variation in soil temperatures accounted for 96 and 99 % of the variation in tuber yield at varied population densities and sowing dates, respectively.
Plots were mechanically sown on ridges in a randomized complete block design with three replications (rainy season) and five replications (dry season).
Of the 44 villages that received seed in 1996, 28 were visited and all of them had sown the seed.
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