Now showing items 1-5 of 5
Some aspects of the economics of nitrogen storage farming in New Zealand
(Lincoln College. Agricultural Economics Research Unit., 1972-05)
In this paper we are concerned with some economic aspects of the use of artificial nitrogen fertilisers in New Zealand agriculture. With the prospect of much cheaper nitrogen fertiliser in the future (and possibly more ...
Response surfaces of growth and yield of wheat
(Lincoln College, University of Canterbury, 1979)
In the 1976-77 and 1977-78 seasons four field experiments using a three factor central composite second order design in incomplete blocks were conducted to quantify the responses of autumn-sown wheats established at five ...
Tiller population dynamics in wheat
(Lincoln College, University of Canterbury, 1978)
In field-sown wheat grown in Canterbury, variation in the density of ears accounts for most of the differences between grain yields (Dougherty 1973; Scott 1978; Scott et al. 1977). Ear number is a component of yield which ...
Nitrogen nutrition of mycorrhizal pines
(Lincoln College, University of Canterbury, 1972)
Nitrogen has been central to many of these speculations regarding the function of mycorrhizas in tree nutrition and growth. Historically it was felt that mycorrhizas were more efficient in absorbing nitrogen from humus ...
Components of grain yield in wheat : a thesis submitted for the degree of Doctor of Philosophy in the University of Canterbury [Lincoln College], New Zealand
(Lincoln College, University of Canterbury, 1977)
Between 1972 and 1976 a series of field experiments were conducted to investigate the factors limiting grain yield in wheat (Triticum aestivum L). Spike population restricted yield when it was below about 500 spikes/m² ...