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Stover quality

A couple of papers today on stover quality, and how to get it. Stover is just the dried stalks and leaves of a crop, left in the field after the grain has been harvested. In many places around the world, it is almost as important as the grain itself, because it is used as animal forage or fodder. Sheep and goats and other animals are often allowed to roam around the harvested fields and eat their fill of the dried remains of the crop as well as any weeds and other volunteer plants they may find.

How to get the best quality stover, in terms of its digestibility and nutrient compositions? Well, as in so many things, genetics and management, according to work by three CG Centres. A paper on pearl millet in India by ICRISAT and ILRI researchers points to the importance of genetics: landraces had better quality stover than hybrids, though it came at the expense of yield. On the other hand, a paper from ICARDA in Syria found that rotations involving growing legumes such as medics or vetch in alternate years improved the protein content of both the grain and stubble of durum wheat. Now, I wonder, is there an interaction between the two? Do some varieties respond better than others to management in terms of their nutritional quality?

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Agra explains

The Alliance for a Green Revolution in Africa has found it necessary to issue a statement clarifying it’s position on Plant Breeding and Genetic Engineering. This is in response to the press that Agra’s Board Chair, Kofi Annan, received when he outlined Agra’s non-GMO position. I’ve read the statement carefully a couple of times now. It does indeed rule out GMOs for the time being. Even for bananas.

Agra says it will reconsider if and when African countries and their people have considered the matter and have put in place rules and regulations for “the safe development and acceptable use of new technologies”.

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Crop national parks?

A new publication by WWF and some friends at the University of Birmingham ((Food Stores: Using Protected Areas to Secure Crop Genetic Diversity. A research report by WWF, Equilibrium and the University of Birmingham, UK. Written by Sue Stolton, Nigel Maxted, Brian Ford-Lloyd, Shelagh Kell, and Nigel Dudley. Published August 2006, WWF – World Wide Fund for Nature)) makes the case for using protected areas, in particular in the centres of origin, to conserve genetic diversity in crops and their wild relatives:

Many of these centres have only five per cent protection, some have only one per cent or less. They include: the Central Andean wet puna of Peru and Bolivia, well known as reservoirs of grains and root crops including the potato; the Eastern Anatolian deciduous forests and steppe of Iran, Turkey and Armenia, centres of diversity for many grains and fruit species; the Southern Korea evergreen forests important for their genetic resources of tea; and the Malaysian rainforests which are centres of diversity for many tropical fruit species, particularly mangoes.

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Reasons to be green: drink

I wonder how many pesticide residues make it from grain ethanol past distillation into liquor? Still, there may be other reasons to favour an organic tipple, like the fact that it encourages biodiversity. Good greens have also given up bottles, and corks, in favour of plastic boxes. But if the drinks industry doesn’t use corks, there’s almost no reason to preserve the groves of cork oaks. And plastic boxes can’t be recycled. Or can they? It’s enough to make my head spin.

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Uganda: grow your own biodiesel

Readers of the Sunday Monitor in Uganda were treated this morning to a long article about Jatropha carcus, a shrubby tree whose seeds contain 40% oil that can be made into biodiesel. The piece is extremely thorough, giving a mass of numbers about Jatropha and pointing out that it can deliver multiple benefits as part of agroforestry systems. Hand presses can keep production local. The seedcake, after pressing out the oil, is rich in nitrogen, phosphorus and potassium and so can be returned to the farm to boost soil fertility. Intercropping suggests that it need not detract from food production. Uganda currently spends US$ 230 million on diesel imports.